ASTM-D2304 2023

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D2304-23 Standard Test Method for Thermal Endurance of Rigid Electrical Insulating Materials

Published By	Publication Date	Number of Pages
ASTM	2023	7

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Categories: 29.035.01 - Insulating materials in general, ASTM

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Description

ASTM D2304-23

Active Standard: Standard Test Method for Thermal Endurance of Rigid Electrical Insulating Materials

ASTM D2304

Scope

1.1 This test method2 provides procedures for evaluating the thermal endurance of rigid electrical insulating materials. Dielectric strength, flexural strength, or water absorption are determined at room temperature after aging for increasing periods of time in air at selected-elevated temperatures. A thermal-endurance graph is plotted using a selected end point at each aging temperature. A means is described for determining a temperature index by extrapolation of the thermal endurance graph to a selected time.

1.2 This test method is most applicable to rigid electrical insulation such as supports, spacers, voltage barriers, coil forms, terminal boards, circuit boards and enclosures for many types of application where retention of the selected property after heat aging is important.

1.3 When dielectric strength is used as the aging criterion, it is also acceptable to use this test method for some thin sheet (flexible) materials, which become rigid with thermal aging, but is not intended to replace Test Method D1830 for those materials which must retain a degree of flexibility in use.

1.4 This test method is not applicable to ceramics, glass, or similar inorganic materials.

1.5 The values stated in metric units are to be regarded as standard. Other units (in parentheses) are provided for information.

1.6 When determining the thermal endurance of rigid EIM, the basic concepts in this standard follow IEEE 1, IEEE 98, and IEEE 101.

1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. A specific warning statement is given in 11.3.4.

1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Keywords

a-c breakdown voltage; flexural strength; heat aging; rigid plates; rigid sheets; thermal endurance; thermosetting laminates; water absorption;

ICS Code

ICS Number Code 29.035.01 (Insulating materials in general)

DOI: 10.1520/D2304-23

Additional information

Standard Title	D2304-23 Standard Test Method for Thermal Endurance of Rigid Electrical Insulating Materials
Published Code	ASTM
Publication Date	2023
Pages Count	7
ICS Codes	29.035.01 - Insulating materials in general